Abstract: An acoustical instrument in which the back and belly of the instrument are allowed to vibrate independently. The instrument is constructed with a hollow body having a back, a belly, and sides which connect the back to the belly. One of the feet of the bridge rests on the belly, while the other foot is supported by a bridge stabilizer, one end portion of the bridge stabilizer mounted on the surface of the belly, the other end portion mounted on the upward end of a sound-post. The sound-post is positioned such that it extends downward from the belly and passes through the belly without touching the same. The downward end of the sound-post terminates at and is mounted to the back.